00:00The Antarctic Ice Sheet covers 98% of the continent.
00:05And contains more than half of the world's fresh water.
00:08But it doesn't just sit there.
00:10Like a giant ice cube.
00:11Much of the ice is constantly flowing toward the sea under the force of the ocean.
00:15Measuring the thickness of the Antarctic Ice Sheet.
00:20More than three kilometers thick in some places.
00:23And mapping the topography of the under...
00:25...the underlying bedrock helps us understand how the ice flows.
00:29And ultimately...
00:30...how much it might contribute to sea level rise.
00:33An international...
00:35...consortium of scientists led by the British Antarctic Survey.
00:38Recently released an updated...
00:40...the map of the bedrock that lies beneath the ice sheet.
00:43This map...
00:45...named Bed Map 2.
00:47Builds on an earlier map that they'd released in 2001.
00:50...and incorporates 25 million additional measurements...
00:53...taken over the past two decades.
00:55...from the ground, air, and space.
00:58Including seven years of...
01:00...surface elevation readings from NASA's ICESat satellite.
01:03And three years of laser...
01:05...and ice-penetrating radar data...
01:07...from a NASA airborne mission called Operation Ice...
01:10...Ice Bridge.
01:12Ice Bridge has flown over many areas of West Antarctica...
01:15...including some never before surveyed.
01:18Improving the coverage and accuracy...
01:20...of a portion of this important data set.
01:23Bed Map 2.
01:25...to give scientists a more accurate picture...
01:27...of the terrain that lies beneath the ice sheet.
01:29A long...
01:30...along with ice thickness and surface elevation data.
01:33Together, these measures...
01:35...will improve scientists' understanding...
01:37...of the evolving Antarctic ice sheet...
01:39...and its influence...
01:40...on the surrounding ocean...
01:41...and our global climate.
01:42...and will enhance scientific understanding...
01:45...of the continent.
01:50At that point, there are two ways that should be used by...
01:57...we've turned into a Japanese and aatter-backed lobby.
02:00A narrow entertainment...
02:01...to be used in a new way here.
02:02By the way, our political climate...
02:05...we've made a refuse HAVIA!!!
02:07Exactly.
02:08As far as a American company's license...
02:09...in cars梅차 Strange Loge...
02:11...es where we enter the work.
02:12...in cars grains...
02:13...juego outside the home...
02:15...in hog wied...
02:16It's making a settlement.
